fix: rotation functionality for PDF page and add corresponding tests

scripts/generate-i18n-pages.mjs

@@ -261,6 +261,9 @@ async function generateI18nPages() {
       if (processed % 10 === 0 || processed === total) {
         console.log(`   Progress: ${processed}/${total} pages`);
       }
+
+      // Clean up JSDOM instances
+      await new Promise((resolve) => setImmediate(resolve));
     }
 
     updateEnglishFile(filePath, originalContent);

src/css/styles.css

@@ -225,7 +225,7 @@ input[type='file']::file-selector-button {
   color: #39a0ed;
 }
 
-.page-thumbnail,
+#page-organizer .page-thumbnail,
 #file-list > li {
   cursor: grab;
 }

src/js/compare/engine/extract-page-model.ts

@@ -496,9 +496,7 @@ export async function extractPageModel(
   page: pdfjsLib.PDFPageProxy,
   viewport: pdfjsLib.PageViewport
 ): Promise<ComparePageModel> {
-  const textContent = await page.getTextContent({
+  const textContent = await page.getTextContent();
-    disableCombineTextItems: true,
-  });
   const styles = textContent.styles ?? {};
   const rawItems = sortCompareTextItems(
     textContent.items

src/js/logic/rotate-pdf-page.ts

@@ -98,38 +98,40 @@ function createPageWrapper(
 
   const rotateLeftBtn = document.createElement('button');
   rotateLeftBtn.className =
-    'flex items-center gap-1 px-3 py-1.5 bg-gray-700 hover:bg-gray-600 text-white rounded border border-gray-600 text-xs';
+    'flex items-center gap-1 px-3 py-1.5 bg-gray-700 hover:bg-gray-600 text-white rounded border border-gray-600 text-xs cursor-pointer';
   rotateLeftBtn.innerHTML = '<i data-lucide="rotate-ccw" class="w-3 h-3"></i>';
-  rotateLeftBtn.onclick = function (e) {
+  rotateLeftBtn.addEventListener('click', function (e) {
     e.stopPropagation();
+    e.preventDefault();
     pageState.rotations[pageIndex] = pageState.rotations[pageIndex] - 90;
     const wrapper = container.querySelector(
       '.thumbnail-wrapper'
     ) as HTMLElement;
     if (wrapper)
       wrapper.style.transform = `rotate(${pageState.rotations[pageIndex]}deg)`;
-  };
+  });
 
   const rotateRightBtn = document.createElement('button');
   rotateRightBtn.className =
-    'flex items-center gap-1 px-3 py-1.5 bg-gray-700 hover:bg-gray-600 text-white rounded border border-gray-600 text-xs';
+    'flex items-center gap-1 px-3 py-1.5 bg-gray-700 hover:bg-gray-600 text-white rounded border border-gray-600 text-xs cursor-pointer';
   rotateRightBtn.innerHTML = '<i data-lucide="rotate-cw" class="w-3 h-3"></i>';
-  rotateRightBtn.onclick = function (e) {
+  rotateRightBtn.addEventListener('click', function (e) {
     e.stopPropagation();
+    e.preventDefault();
     pageState.rotations[pageIndex] = pageState.rotations[pageIndex] + 90;
     const wrapper = container.querySelector(
       '.thumbnail-wrapper'
     ) as HTMLElement;
     if (wrapper)
       wrapper.style.transform = `rotate(${pageState.rotations[pageIndex]}deg)`;
-  };
+  });
 
   controls.append(rotateLeftBtn, rotateRightBtn);
   container.appendChild(controls);
 
-  // Re-create icons for the new element
+  // Re-create icons scoped to this container only
   setTimeout(function () {
-    createIcons({ icons });
+    createIcons({ icons, nameAttr: 'data-lucide', attrs: {} });
   }, 0);
 
   return container;

src/tests/rotate-pdf-page.test.ts

@@ -0,0 +1,380 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+
+interface RotateState {
+  rotations: number[];
+}
+
+function createTestState(pageCount: number): RotateState {
+  return { rotations: new Array(pageCount).fill(0) };
+}
+
+function createPageWrapper(
+  pageNumber: number,
+  state: RotateState
+): HTMLElement {
+  const pageIndex = pageNumber - 1;
+
+  const container = document.createElement('div');
+  container.className =
+    'page-thumbnail relative bg-gray-700 rounded-lg overflow-hidden';
+  container.dataset.pageIndex = pageIndex.toString();
+  container.dataset.pageNumber = pageNumber.toString();
+
+  const canvasWrapper = document.createElement('div');
+  canvasWrapper.className =
+    'thumbnail-wrapper flex items-center justify-center p-2 h-36';
+  canvasWrapper.style.transition = 'transform 0.3s ease';
+  const initialRotation = state.rotations[pageIndex] || 0;
+  canvasWrapper.style.transform = `rotate(${initialRotation}deg)`;
+
+  const canvas = document.createElement('canvas');
+  canvas.className = 'max-w-full max-h-full object-contain';
+  canvasWrapper.appendChild(canvas);
+
+  container.appendChild(canvasWrapper);
+
+  const controls = document.createElement('div');
+  controls.className = 'flex items-center justify-center gap-2 p-2 bg-gray-800';
+
+  const rotateLeftBtn = document.createElement('button');
+  rotateLeftBtn.className =
+    'rotate-left-btn flex items-center gap-1 px-3 py-1.5 bg-gray-700 hover:bg-gray-600 text-white rounded border border-gray-600 text-xs cursor-pointer';
+  rotateLeftBtn.addEventListener('click', function (e) {
+    e.stopPropagation();
+    e.preventDefault();
+    state.rotations[pageIndex] = state.rotations[pageIndex] - 90;
+    const wrapper = container.querySelector(
+      '.thumbnail-wrapper'
+    ) as HTMLElement;
+    if (wrapper)
+      wrapper.style.transform = `rotate(${state.rotations[pageIndex]}deg)`;
+  });
+
+  const rotateRightBtn = document.createElement('button');
+  rotateRightBtn.className =
+    'rotate-right-btn flex items-center gap-1 px-3 py-1.5 bg-gray-700 hover:bg-gray-600 text-white rounded border border-gray-600 text-xs cursor-pointer';
+  rotateRightBtn.addEventListener('click', function (e) {
+    e.stopPropagation();
+    e.preventDefault();
+    state.rotations[pageIndex] = state.rotations[pageIndex] + 90;
+    const wrapper = container.querySelector(
+      '.thumbnail-wrapper'
+    ) as HTMLElement;
+    if (wrapper)
+      wrapper.style.transform = `rotate(${state.rotations[pageIndex]}deg)`;
+  });
+
+  controls.append(rotateLeftBtn, rotateRightBtn);
+  container.appendChild(controls);
+
+  return container;
+}
+
+function batchRotateAll(
+  state: RotateState,
+  angle: number,
+  containers: HTMLElement[]
+) {
+  for (let i = 0; i < state.rotations.length; i++) {
+    state.rotations[i] = state.rotations[i] + angle;
+  }
+  for (const container of containers) {
+    const idx = parseInt(container.dataset.pageIndex!, 10);
+    const wrapper = container.querySelector(
+      '.thumbnail-wrapper'
+    ) as HTMLElement;
+    if (wrapper) wrapper.style.transform = `rotate(${state.rotations[idx]}deg)`;
+  }
+}
+
+describe('rotate-pdf-page – page wrapper', () => {
+  let parentContainer: HTMLElement;
+
+  beforeEach(() => {
+    parentContainer = document.createElement('div');
+    parentContainer.id = 'page-thumbnails';
+    document.body.appendChild(parentContainer);
+  });
+
+  it('should create a page wrapper with correct data attributes', () => {
+    const state = createTestState(3);
+    const wrapper = createPageWrapper(1, state);
+    expect(wrapper.dataset.pageIndex).toBe('0');
+    expect(wrapper.dataset.pageNumber).toBe('1');
+  });
+
+  it('should have left and right rotation buttons', () => {
+    const state = createTestState(1);
+    const wrapper = createPageWrapper(1, state);
+    const leftBtn = wrapper.querySelector('.rotate-left-btn');
+    const rightBtn = wrapper.querySelector('.rotate-right-btn');
+    expect(leftBtn).not.toBeNull();
+    expect(rightBtn).not.toBeNull();
+  });
+
+  it('should rotate right by 90° on right-button click', () => {
+    const state = createTestState(1);
+    const wrapper = createPageWrapper(1, state);
+    parentContainer.appendChild(wrapper);
+
+    const rightBtn = wrapper.querySelector('.rotate-right-btn') as HTMLElement;
+    rightBtn.click();
+
+    expect(state.rotations[0]).toBe(90);
+    const tw = wrapper.querySelector('.thumbnail-wrapper') as HTMLElement;
+    expect(tw.style.transform).toBe('rotate(90deg)');
+  });
+
+  it('should rotate left by -90° on left-button click', () => {
+    const state = createTestState(1);
+    const wrapper = createPageWrapper(1, state);
+    parentContainer.appendChild(wrapper);
+
+    const leftBtn = wrapper.querySelector('.rotate-left-btn') as HTMLElement;
+    leftBtn.click();
+
+    expect(state.rotations[0]).toBe(-90);
+    const tw = wrapper.querySelector('.thumbnail-wrapper') as HTMLElement;
+    expect(tw.style.transform).toBe('rotate(-90deg)');
+  });
+
+  it('should remain functional after multiple right-button clicks', () => {
+    const state = createTestState(1);
+    const wrapper = createPageWrapper(1, state);
+    parentContainer.appendChild(wrapper);
+
+    const rightBtn = wrapper.querySelector('.rotate-right-btn') as HTMLElement;
+
+    rightBtn.click();
+    expect(state.rotations[0]).toBe(90);
+
+    rightBtn.click();
+    expect(state.rotations[0]).toBe(180);
+
+    rightBtn.click();
+    expect(state.rotations[0]).toBe(270);
+
+    rightBtn.click();
+    expect(state.rotations[0]).toBe(360);
+
+    const tw = wrapper.querySelector('.thumbnail-wrapper') as HTMLElement;
+    expect(tw.style.transform).toBe('rotate(360deg)');
+  });
+
+  it('should remain functional after multiple left-button clicks', () => {
+    const state = createTestState(1);
+    const wrapper = createPageWrapper(1, state);
+    parentContainer.appendChild(wrapper);
+
+    const leftBtn = wrapper.querySelector('.rotate-left-btn') as HTMLElement;
+
+    leftBtn.click();
+    expect(state.rotations[0]).toBe(-90);
+
+    leftBtn.click();
+    expect(state.rotations[0]).toBe(-180);
+
+    leftBtn.click();
+    expect(state.rotations[0]).toBe(-270);
+  });
+
+  it('should allow alternating left and right clicks', () => {
+    const state = createTestState(1);
+    const wrapper = createPageWrapper(1, state);
+    parentContainer.appendChild(wrapper);
+
+    const leftBtn = wrapper.querySelector('.rotate-left-btn') as HTMLElement;
+    const rightBtn = wrapper.querySelector('.rotate-right-btn') as HTMLElement;
+
+    rightBtn.click();
+    rightBtn.click();
+    leftBtn.click();
+    rightBtn.click();
+    leftBtn.click();
+    leftBtn.click();
+
+    expect(state.rotations[0]).toBe(0);
+  });
+
+  it('should independently rotate different pages', () => {
+    const state = createTestState(3);
+    const w1 = createPageWrapper(1, state);
+    const w2 = createPageWrapper(2, state);
+    const w3 = createPageWrapper(3, state);
+    parentContainer.append(w1, w2, w3);
+
+    (w1.querySelector('.rotate-right-btn') as HTMLElement).click();
+    (w2.querySelector('.rotate-left-btn') as HTMLElement).click();
+
+    expect(state.rotations).toEqual([90, -90, 0]);
+  });
+
+  it('should allow per-page rotation after a batch rotation', () => {
+    const state = createTestState(3);
+    const w1 = createPageWrapper(1, state);
+    const w2 = createPageWrapper(2, state);
+    const w3 = createPageWrapper(3, state);
+    parentContainer.append(w1, w2, w3);
+
+    batchRotateAll(state, 90, [w1, w2, w3]);
+    expect(state.rotations).toEqual([90, 90, 90]);
+
+    const rightBtn = w1.querySelector('.rotate-right-btn') as HTMLElement;
+    rightBtn.click();
+    expect(state.rotations[0]).toBe(180);
+
+    rightBtn.click();
+    expect(state.rotations[0]).toBe(270);
+
+    expect(state.rotations[1]).toBe(90);
+    expect(state.rotations[2]).toBe(90);
+  });
+
+  it('should allow per-page rotation after multiple batch rotations', () => {
+    const state = createTestState(2);
+    const w1 = createPageWrapper(1, state);
+    const w2 = createPageWrapper(2, state);
+    parentContainer.append(w1, w2);
+
+    batchRotateAll(state, 90, [w1, w2]);
+    batchRotateAll(state, 90, [w1, w2]);
+
+    expect(state.rotations).toEqual([180, 180]);
+
+    (w1.querySelector('.rotate-left-btn') as HTMLElement).click();
+    expect(state.rotations[0]).toBe(90);
+
+    (w1.querySelector('.rotate-left-btn') as HTMLElement).click();
+    expect(state.rotations[0]).toBe(0);
+  });
+
+  it('should allow batch rotation after per-page rotation', () => {
+    const state = createTestState(2);
+    const w1 = createPageWrapper(1, state);
+    const w2 = createPageWrapper(2, state);
+    parentContainer.append(w1, w2);
+
+    (w1.querySelector('.rotate-right-btn') as HTMLElement).click();
+    expect(state.rotations[0]).toBe(90);
+
+    batchRotateAll(state, -90, [w1, w2]);
+    expect(state.rotations).toEqual([0, -90]);
+
+    (w2.querySelector('.rotate-right-btn') as HTMLElement).click();
+    expect(state.rotations[1]).toBe(0);
+  });
+
+  it('should apply correct CSS transform on each click', () => {
+    const state = createTestState(1);
+    const wrapper = createPageWrapper(1, state);
+    parentContainer.appendChild(wrapper);
+
+    const tw = wrapper.querySelector('.thumbnail-wrapper') as HTMLElement;
+    const rightBtn = wrapper.querySelector('.rotate-right-btn') as HTMLElement;
+
+    expect(tw.style.transform).toBe('rotate(0deg)');
+
+    rightBtn.click();
+    expect(tw.style.transform).toBe('rotate(90deg)');
+
+    rightBtn.click();
+    expect(tw.style.transform).toBe('rotate(180deg)');
+  });
+
+  it('should apply initial rotation from state', () => {
+    const state = createTestState(2);
+    state.rotations[0] = 180;
+    state.rotations[1] = -90;
+
+    const w1 = createPageWrapper(1, state);
+    const w2 = createPageWrapper(2, state);
+
+    const tw1 = w1.querySelector('.thumbnail-wrapper') as HTMLElement;
+    const tw2 = w2.querySelector('.thumbnail-wrapper') as HTMLElement;
+
+    expect(tw1.style.transform).toBe('rotate(180deg)');
+    expect(tw2.style.transform).toBe('rotate(-90deg)');
+  });
+
+  it('should stop click propagation on rotation buttons', () => {
+    const state = createTestState(1);
+    const wrapper = createPageWrapper(1, state);
+    parentContainer.appendChild(wrapper);
+
+    const parentClickSpy = vi.fn();
+    wrapper.addEventListener('click', parentClickSpy);
+
+    const rightBtn = wrapper.querySelector('.rotate-right-btn') as HTMLElement;
+    rightBtn.click();
+
+    expect(parentClickSpy).not.toHaveBeenCalled();
+  });
+
+  it('should have cursor-pointer class on rotation buttons', () => {
+    const state = createTestState(1);
+    const wrapper = createPageWrapper(1, state);
+
+    const leftBtn = wrapper.querySelector('.rotate-left-btn') as HTMLElement;
+    const rightBtn = wrapper.querySelector('.rotate-right-btn') as HTMLElement;
+
+    expect(leftBtn.classList.contains('cursor-pointer')).toBe(true);
+    expect(rightBtn.classList.contains('cursor-pointer')).toBe(true);
+  });
+
+  it('should handle rapid successive clicks without losing state', () => {
+    const state = createTestState(1);
+    const wrapper = createPageWrapper(1, state);
+    parentContainer.appendChild(wrapper);
+
+    const rightBtn = wrapper.querySelector('.rotate-right-btn') as HTMLElement;
+
+    for (let i = 0; i < 20; i++) {
+      rightBtn.click();
+    }
+
+    expect(state.rotations[0]).toBe(20 * 90);
+  });
+
+  it('should keep working even if button innerHTML is replaced (simulating createIcons)', () => {
+    const state = createTestState(1);
+    const wrapper = createPageWrapper(1, state);
+    parentContainer.appendChild(wrapper);
+
+    const rightBtn = wrapper.querySelector('.rotate-right-btn') as HTMLElement;
+
+    rightBtn.click();
+    expect(state.rotations[0]).toBe(90);
+
+    rightBtn.innerHTML = '<svg class="w-3 h-3"></svg>';
+
+    rightBtn.click();
+    expect(state.rotations[0]).toBe(180);
+
+    rightBtn.click();
+    expect(state.rotations[0]).toBe(270);
+  });
+
+  it('should keep working after replaceChild on icon element inside button', () => {
+    const state = createTestState(1);
+    const wrapper = createPageWrapper(1, state);
+    parentContainer.appendChild(wrapper);
+
+    const leftBtn = wrapper.querySelector('.rotate-left-btn') as HTMLElement;
+
+    leftBtn.click();
+    expect(state.rotations[0]).toBe(-90);
+
+    const oldChild = leftBtn.firstChild;
+    if (oldChild) {
+      const svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
+      svg.setAttribute('class', 'w-3 h-3');
+      leftBtn.replaceChild(svg, oldChild);
+    }
+
+    leftBtn.click();
+    expect(state.rotations[0]).toBe(-180);
+
+    leftBtn.click();
+    expect(state.rotations[0]).toBe(-270);
+  });
+});